phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '55172bd773260cb6518f9f54a2e203ad' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('55172bd773260cb6518f9f54a2e203ad', -1, 1768303601, 1768303601, '7f000001', -10, 0, 0)

Line : 187
File : sessions.php